Optical character recognition system

Details Optical character recognition system Optical character recognition system

1991-04-26

1994-11-29

Couso, Yon J.

Image analysis

Histogram processing

For setting a threshold

382 9, G06K 946, G06K 934

Patent

active

053697154

ABSTRACT:
A histogram is prepared using the heights of characters in an input alphanumeric character image data set. Based on this histogram, reference line characters are detected from the character row. The upper and lower extracting ordinates of each character in the character row are obtained. Then, the average of each of the upper and lower extracting ordinates in the character row is determined as the ordinate of a reference line for the character row. Thus obtained reference line is used for character recognition.

REFERENCES:
patent: 4251799 (1981-02-01), Jih
patent: 4377803 (1983-03-01), Lotspeich et al.
patent: 4860376 (1989-08-01), Tanaka et al.
patent: 4918740 (1990-04-01), Ross
patent: 4926492 (1990-05-01), Tanaka et al.
patent: 4998285 (1991-03-01), Suzuki et al.

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